Gleb Rudolfovich Samoilov (born August 4, 1970, Asbest, USSR) is a Soviet and Russian singer, songwriter, composer, and frontman of the rock band The MATRIXX. He is also a former frontman of the band Agata Kristi. He is the younger brother of Vadim Samoilov.

Despite dreaming of his own band, in 1987, Gleb Samoilov joined Pyotr May, Alexander Kozlov, and his older brother, Vadim Samoilov. The official birthday of "Agatha Christie" is considered to be February 20, 1988, when the band's first concert under that name took place in the assembly hall of the Ural Polytechnic Institute.

From 1991 until the band's end in 2010, he was the primary author of both lyrics and music. He wrote most of the songs, including the most famous ones.

«The MATRIXX is like a deferred story. It's what I should have been doing at 17, if Agata hadn't happened. Agata Christie wasn't my band; I was invited to join it... I was only able to pursue my own creative endeavors in 2010. During that time, a mountain of human and moral debts accumulated, which I settled with my last album. An idiot's dream came true, late, but it did.»

— Gleb Samoilov, Novaya Gazeta, April 18, 2019

The first albums surprised some critics and fans, shocked by the lyrics, the musicians' image, and their "unlikeness to Agata Christie." The "XX" in the band's name also irritated some. The leitmotifs of The Matrixx's compositions became themes of cruel love, the conflict between the inner man and the outer world and God.

Does anybody like Gleb Samoiloff & The MATRIXX?